381932756018 has 18 divisors (see below), whose sum is σ = 629731428543. Its totient is φ = 173601428220.

The previous prime is 381932755979. The next prime is 381932756027. The reversal of 381932756018 is 810657239183.

It can be written as a sum of positive squares in only one way, i.e., 190966378009 + 190966378009 = 436997^2 + 436997^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=436997.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 9594071 + ... + 9633797.

Almost surely, 2^381932756018 is an apocalyptic number.

381932756018 is a deficient number, since it is larger than the sum of its proper divisors (247798672525).

381932756018 is an frugal number, since it uses more digits than its factorization.

381932756018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79478 (or 39740 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 53.

The spelling of 381932756018 in words is "three hundred eighty-one billion, nine hundred thirty-two million, seven hundred fifty-six thousand, eighteen".